IOLAUS. By Dr. C. Aurivillujs. 
405 
I. pallene Wallengr. (69 b). Both wings above light ochreous or almost creamy; hindwing at the anal pallene. 
angle orange; a fine marginal line and the fringes are black; the apex of the forewing from the middle of the 
costal margin to vein 3 or 2 black; anal lobe of hindwing with a black transverse streak. Wings beneath orange 
with a black transverse streak at the end of the discal cell of the forewing and a black discal line on both 
wings, which is interrupted in l c of the hindwing; a black transverse streak close at the margin in 1 b (1 c) 
and 2. The $ resembles the but it is coloured somewhat paler. German South West Africa, Transvaal, 
Natal and German East Africa. 
Ninth Group of Species. 
In this group I combine some species placed to Epamera by Ham. Druce, exhibiting, however, in many 
respects a habitus foreign to the genus. They are smaller, on an average, than the other species of Iolaus and 
live in open, dry or even desert-like regions where they apparently visit the Acacias, but probably in fact only 
the Loranthaceae being parasitic on these trees, since their larvae presumably live on these parasitic plants. 
The species have hitherto only been met with in South Africa, in the Somali Land, Arabia and the Sudan, 
and are surely altogether absent in the wooded'parts of Africa. One species is distributed from Arabia to the 
south-eastern part of the palearctic region. 
By the broad, white or whitish-grey, uni-coloured frons they are at once discernible from the other 
species. Hindwing only with 2 small tails, of which that at vein 1 b is at least twice as long as the one at vein 2. 
Review of the Species. 
A. Hindwing beneath about midway between the base and the discal transverse streak (at the cell-end) with 
a distinct, often sharply dentate, dark transverse line. 
v.. The submarginal line of the hindwing beneath as far as the costal margin fine and distinct. • —- <$. Forewing 
beneath at the anal margin with a black hair-pencil. Hindwing above at the origins of veins 6 and 7 
with a black mealy spot. 
*. Both wings beneath of a white or whitish-grey ground-colour. Transverse lines beneath reddish- 
brown. /. mimosae. 
**. Both wings beneath blackish-grey with a violet reflection. Transverse lines purely black. 
I. obscurus. 
p. The submarginal line of the hindwing beneath, at the costal margin in the areas (5) 6 and 7 passes over 
into a large, dark spot (which is unfortunately absent in fig. 69 c). 
*. The blue colour of the upper surface is a bright azure or smalt ; hindwing beneath between the discal 
line and the submarginal line in the areas 4 and 5 not or only irregularly darkened. — <$. Forewing 
beneath with a black hair-pencil at the anal margin; hindwing above at the origins of the veins 6 
and 7 with a black mealy spot. I. nursei. 
I. tajoracus. 
**. The blue colour of the upper surface delicately violettish-blue. Hindwing beneath between the 
transverse lines in the areas 4 and 5 uniformly darkened, whereby a large, dark, almost quadrangular, 
sharply defined spot is formed. I. umbrosus. 
B. Hindwing beneath in the basal part at least as far as the end of the discal cell uni-coloured white without 
markings. 
a. The discal and submarginal lines of the under surface fine and indistinct or entirely absent. -— <$. Forewing 
beneath at the anal margin with a black hair-pencil; hind wing above without a dark mealy spot. 
I. bicaudatus. 
p. The discal and submarginal lines of the under surface are black, coherent and distinctly prominent. 
— cL Forewing without a hair-pencil; hinclwing above at the origins of the veins 6 and 7 with a distinct, 
black mealy spot. I. jordanus. 
I. glaucus. 
I. mimosae Trim. (70 e). <$. Wings above lustrous light blue; forewing at the costal margin as far mimosae. 
as the discal cell, at the apex as far as the end of the discal cell and vein 3 and between vein 2 and the anal 
margin about 2 to 3 mm broad blackish; hindwing above at the costal margin as far as vein 7 blackish, 
at the proximal margin in 1 a and 1 b whitish-grey and at the margin with a very fine black line which is some¬ 
times expanded like a spot at the apex in area 6; anal lobe whitish with a black, green-scaled spot; a black 
marginal spot in 2 and a similar transverse streak in 1 c; the mealy spot is situate at the base of area 6, 
jet-black, sharply defined and surrounded by a narrow whitish-grey zone. Under surface light grey with reddish- 
brown transverse lines; forewing with a transverse streak at the cell-end and the two usual postmedian transverse 
lines; hindwing with a basal transverse line, a fine streak at the end of the discal cell, a thick, irregular discal 
transverse line and a fine submarginal line. The $ differs but little from the the dark costal margin of 
the hindwing reaches to vein 6 and black submarginal streaks appear in all the areas. Cape Colony to 
Somaliland. 
